Motor Protection Circuit Breakers

Motor protection circuit breakers act as protection devices for electric motors, monitoring the electrical supply in motor circuits of 50-60Hz. They protect against phase unbalances and losses, which are detrimental to motors, offer protection against current overload, and prevent short circuits.


What are motor protection circuit breakers used for?

Motor protection circuit breakers are useful in industrial and building applications such as chillers, compressors, heat pumps and cooling towers, to prevent damages from short circuits or power surges. In the manufacturing industry, circuit breakers interrupt electrical faults below the breaking capacity, which protects machinery and equipment from blowouts.


Types of motor protection circuit breakers

Motor protection circuit breakers come in A type or B type classifications, dependent on utilisation and function.


The A type breaker is not explicitly intended for selectivity and does not allow intentional short time delay under short circuit conditions.This means that the system interrupts immediately when current or voltage levels match the breaking capacity.


Type B breakers allow for an intentional and adjustable short time delay under short circuit conditions, which enables the system to continue for a short while with currents exceeding breaking capacity levels.


...
Lees meer Lees minder

Filters

81 - 100 van 500 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs Current Range Number of Poles Range Breaking Capacity Terminal Type Voltage Rating Reset Method Length Width Depth Dimensions For Use With Series
RS-stocknr. 818-104
FabrikantnummerPKZM0-0,16
FabrikantEaton
55,52 €
Each
Aantal stuks
0.1 → 0.16 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 243-7167
Fabrikantnummer3RV1011-1HA10
FabrikantSiemens
66,80 €
Each
Aantal stuks
5.5 → 8 A 3P Sirius Innovation 50 kA Screw 690 V - 90mm 45mm 81mm 90 x 45 x 81 mm - 3RV1
RS-stocknr. 619-4713
FabrikantnummerPKZM4-63
FabrikantEaton
254,76 €
Each
Aantal stuks
55 → 65 A 3P - 60 kA Screw 690 V ac - 140mm 55mm 160mm 140 x 55 x 160 mm - PKZM 4
RS-stocknr. 744-6891
FabrikantnummerGV2RT21
109,40 €
Each
Aantal stuks
17 → 23 A 3P TeSys - Screw 690 V - 89mm 44.5mm 78.5mm 89 x 44.5 x 78.5 mm - GV2R
RS-stocknr. 818-154
FabrikantnummerPKZM0-1,6
FabrikantEaton
74,58 €
Each
Aantal stuks
1 → 1.6 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 754-6660
Fabrikantnummer3RV1011-0EA15
FabrikantSiemens
82,70 €
Each
Aantal stuks
0.4 A 3P Sirius Innovation 100 kA Screw 690 V ac/dc - 90mm 45mm 81mm 90 x 45 x 81 mm - -
RS-stocknr. 706-1780
Fabrikantnummer3RV2011-1BA20
FabrikantSiemens
71,60 €
Each
Aantal stuks
1.4 → 2 A 3P Sirius Innovation 10 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 305-2161
FabrikantnummerGV2P06
93,20 €
Each
Aantal stuks
1 → 1.6 A 3P TeSys 100 kA Screw 690 V - 89mm 44.5mm 97mm 89 x 44.5 x 97 mm - GV2P
RS-stocknr. 706-1853
Fabrikantnummer3RV2021-4BA10
FabrikantSiemens
87,00 €
Each
Aantal stuks
14 → 20 A 3P Sirius Innovation 4 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 121-6853
FabrikantRS PRO
31,36 €
Each
Aantal stuks
6.3 → 10 A 3 - 100 kA @ 230 V Screw 690 V Automatic 45mm 89.5mm 78.5mm 45 x 89.5 x 78.5 mm Motor Protection Switches MS32
RS-stocknr. 706-1813
Fabrikantnummer3RV2011-1GA20
FabrikantSiemens
71,60 €
Each
Aantal stuks
4.5 → 6.3 A 3P Sirius Innovation 6 kA Cage Clamp 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 124-3092
Fabrikantnummer3RV2021-1KA10
FabrikantSiemens
83,50 €
Each
Aantal stuks
9 → 12.5 A 3 Sirius Innovation 100 kA @ 400 V ac Screw 690 V ac Manual 45mm 96.9mm 97mm 45 x 97 x 96.9 mm Three Phase Motors 3RV2
RS-stocknr. 492-1513
FabrikantnummerPKZM01-1.6
FabrikantEaton
57,19 €
Each
Aantal stuks
1 → 1.6 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 90.5mm 93 x 45 x 90.5 mm - PKZM 01
RS-stocknr. 351-5347
Fabrikantnummer140M-C2E-B16
FabrikantAllen Bradley
75,90 €
Each
Aantal stuks
1 → 1.6 A 3P - 100 kA - 415 V - 90mm 45mm 74mm 90 x 45 x 74 mm - 140M
RS-stocknr. 706-1730
Fabrikantnummer3RV2011-0EA10
FabrikantSiemens
60,30 €
Each
Aantal stuks
0.28 → 0.4 A 3P Sirius Innovation 100 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 124-3106
Fabrikantnummer3RV2021-4CA15
FabrikantSiemens
110,00 €
Each
Aantal stuks
17 → 22 A 3 Sirius Innovation 55 kA @ 400 V ac Screw 690 V ac Manual 45mm 96.9mm 97mm 45 x 97 x 96.9 mm Three Phase Motors SRV2
RS-stocknr. 706-1831
Fabrikantnummer3RV2011-1KA10
FabrikantSiemens
80,30 €
Each
Aantal stuks
9 → 12 A 3P Sirius Innovation 6 kA Screw 690 V - 97mm 45mm 91mm 97 x 45 x 91 mm - 3RV2
RS-stocknr. 754-6691
Fabrikantnummer3RV1031-4FA15
FabrikantSiemens
247,00 €
Each
Aantal stuks
40 A 3P Sirius Innovation 50 kA Screw 690 V ac/dc - 140mm 55mm 149mm 140 x 55 x 149 mm - -
RS-stocknr. 818-110
FabrikantnummerPKZM0-0,25
FabrikantEaton
55,52 €
Each
Aantal stuks
0.16 → 0.25 A 3P - 60 kA Screw 690 V ac - 93mm 45mm 76mm 93 x 45 x 76 mm - PKZM 0
RS-stocknr. 122-0735
FabrikantnummerMPW18-3-U018
FabrikantWEG
65,51 €
Each
Aantal stuks
12 → 18 A 3 - 10 kA/415V Screw 690 V Manual 90mm 45mm 77mm 44.8 x 77 x 97 mm Motors MPW18
Related Products
Covers motors up to 16A (7.5kW)Local isolatorProtects against ...
Description:
Covers motors up to 16A (7.5kW)Local isolatorProtects against overloads, short circuits, phase failure and faults in cabling or wiringThese Motor Starters can be used in conjunction with ABB Contactors, stock no. 445-0897 typicallyAccessories available from auxiliary/signal contacts to under voltage ...
Highly conductive auxiliary contacts with four contact pointsQuick ...
Description:
Highly conductive auxiliary contacts with four contact pointsQuick connect - snap on accessory mountingDistinct contact status indicationUp to four auxiliary contacts can be mountedMechanical interlock only 5mm deepPositive (force) guided contacts (mechanically-linked per IEC)three-pole contactors, 9 to 110A IEC ...
Maximum rated current 100A (45kW @ 400V a.c.)Rated ...
Description:
Maximum rated current 100A (45kW @ 400V a.c.)Rated operational voltage: 690VShort-circuit proof to 50kA @ 400V a.c.Maximum switching frequency; 15 operations/hourMechanical life; 105 operationsAmbient temperature range; –20 to +60 ° CLong term stabilityManual resetLockable in off position.
Overload protection compensated -5 to +40°CLockable in 'OFF' ...
Description:
Overload protection compensated -5 to +40°CLockable in 'OFF' positionShort circuit protection, therefore, no back-up fuse protection is required where the prospective fault level is less than the breaking capacity of the unitExpected life cycles 0.1 x 106Maximum switching frequency 40 ...